Ответ:
CaO= 1Ca, 1O=2
FeO=1Fe, 1O=2
CuO= 1Cu, 1O=2
CO=1C, 1O=2
SO2= 1S,2O=3
MgO=1Mg, 1O=2
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Ответ:
CaO= 1Ca, 1O=2
FeO=1Fe, 1O=2
CuO= 1Cu, 1O=2
CO=1C, 1O=2
SO2= 1S,2O=3
MgO=1Mg, 1O=2